All data are in degrees Fahrenheit

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Water temperature in Fukuoka

Detailed information about the current water temperature in Fukuoka. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in Fukuoka now

85.7

°F

August 28, 12:03

Trend:

decreasing

Yesterday:

86.1°F

Tomorrow:

85.3°F

Sunrise:

05:49

Sunset:

18:50

Day Length:

13 h. 1 min.

Fukuoka in September

Minimum:

56.7°F

Average:

58.8°F

Maximum:

61.0°F

Sea water temperature in Fukuoka today

As of now, in Fukuoka, the water temperature is 85.7°F. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort. Today's reading is 2.8°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to fall a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 85.9°F on 2025, while the historical minimum was 80.7°F on 2019.

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the histoorical minimum and others when it was close to the historical maximum. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 84.8°F, the minimum temperature may reach 84.0°F, and the maximum might stay at 85.5°F.

Daily water temperature in Fukuoka

Date Current Year

actual* / forecast**

last year 10 years average
Aug 14 82.7°F 83.2°F 82.6°F
Aug 15 82.7°F 85.1°F 82.9°F
Aug 16 82.3°F 86.1°F 82.9°F
Aug 17 82.0°F 86.3°F 82.8°F
Aug 18 82.5°F 86.3°F 82.7°F
Aug 19 81.9°F 86.0°F 82.8°F
Aug 20 83.0°F 86.1°F 83.0°F
Aug 21 83.6°F 86.4°F 83.2°F
Aug 22 84.5°F 85.6°F 83.2°F
Aug 23 85.2°F 85.9°F 83.2°F
Aug 24 86.1°F 85.2°F 83.3°F
Aug 25 86.6°F 87.0°F 83.5°F
Aug 26 86.9°F 86.6°F 83.6°F
Aug 27 86.1°F 87.1°F 83.3°F
Aug 28 85.7°F 85.9°F 82.9°F
Aug 29 85.3°F 84.8°F 82.5°F
Aug 30 85.5°F 85.9°F 82.7°F
Aug 31 85.2°F 85.7°F 82.5°F
Sep 1 84.9°F 85.9°F 82.2°F
Sep 2 84.4°F 85.3°F 81.7°F
Sep 3 84.1°F 84.4°F 81.3°F
Sep 4 84.0°F 85.4°F 81.2°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Fukuoka by month

In Fukuoka, the months July through October offer comfortable swimming conditions, which amounts to 112 swimming days.
The warmest water in Fukuoka was recorded on July 28, 2026, reaching a 88.4°F. While the coldest temperature occurred on March 10, 2025, dipping to 51.7°F. The average readings by season are 58.5°F in Winter, 60.3°F in Spring, 78.0°F in Summer, and 73.5°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Kitakyushu 84.8°F 30mi
Shimonoseki 83.8°F 39mi
Kumamoto 86.7°F 57mi
Nagasaki 87.0°F 66mi

* current water temperature in this city

** straight line distance from Fukuoka